:root{
  --azul: #24588d;
  --azul-oscuro: #1a4269;
  --rojo: #e73a34;
  --rojo-texto: #c62d28; /* rojo institucional oscurecido: contraste AA (5,5:1) para texto */
  --fondo: #ffffff;
  --gris-fondo: #f7f8fa;
  --texto: #26292c;
  --texto-suave: #5a6169;
  --borde: #dfe3e8;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--fondo);
  color:var(--texto);
  font-family:'Roboto', Arial, Helvetica, sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.brand{
  font-family:'Roboto Condensed', Arial, Helvetica, sans-serif;
  color:var(--azul-oscuro);
  font-weight:700;
  line-height:1.2;
}
a{color:var(--azul)}
a:hover{color:var(--rojo-texto)}

.wrap{max-width:920px;margin:0 auto;padding:0 20px}

/* Header */
header.site{
  border-bottom:3px solid var(--azul);
  background:#fff;
}
header.site .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  padding-top:16px;
  padding-bottom:16px;
}
.brandblock{display:flex;align-items:center;gap:16px}
.brandblock img{height:66px;width:auto;display:block}
.brandblock .names{display:flex;flex-direction:column;line-height:1.15}
.brandblock .group-name{font-family:'Roboto Condensed',sans-serif;font-weight:700;font-size:20px;color:var(--azul-oscuro)}
.brandblock .inst-name{font-size:12.5px;color:var(--texto-suave)}

.navblock{display:flex;align-items:center;gap:22px;flex-wrap:wrap}

nav.site{display:flex;gap:22px;flex-wrap:wrap}
nav.site a{
  text-decoration:none;
  color:var(--texto);
  font-size:15px;
  font-weight:500;
  padding:4px 2px;
  border-bottom:2px solid transparent;
}
nav.site a:hover{color:var(--azul);border-bottom-color:var(--azul)}
nav.site a.active{color:var(--azul);border-bottom-color:var(--rojo)}

/* Language toggle */
.lang-toggle{
  display:inline-flex;
  border:1.5px solid var(--azul);
  border-radius:999px;
  overflow:hidden;
  flex-shrink:0;
}
.lang-toggle a{
  font-family:'Roboto Condensed',sans-serif;
  font-size:12px;
  font-weight:700;
  letter-spacing:.03em;
  text-decoration:none;
  color:var(--azul);
  padding:6px 13px;
  transition:background .15s ease,color .15s ease;
}
.lang-toggle a.active{
  background:var(--azul);
  color:#fff;
  pointer-events:none;
}
.lang-toggle a:not(.active):hover{background:var(--gris-fondo)}

/* Hero */
.hero{background:var(--gris-fondo);border-bottom:1px solid var(--borde)}
.hero .wrap{padding:56px 20px 48px}
.hero h1{font-size:34px;margin:0 0 10px}
.hero p.lead{font-size:17px;color:var(--texto-suave);max-width:640px;margin:0 0 22px}
.btn{
  display:inline-block;
  background:var(--rojo-texto);
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:14.5px;
  padding:11px 22px;
  border-radius:4px;
}
.btn:hover{background:#a8231f;color:#fff}
.btn.secondary{background:transparent;color:var(--azul);border:1.5px solid var(--azul)}
.btn.secondary:hover{background:var(--azul);color:#fff}

/* Content */
main{padding:44px 0 64px}
main h1.page-title{font-size:28px;margin:0 0 6px}
.subtitle{color:var(--texto-suave);font-size:15px;margin:0 0 32px}
.block{margin-bottom:28px}
.block p{margin:0 0 14px;font-size:15.5px}

/* Collapsible sections */
details.block{
  border-bottom:1px solid var(--borde);
  padding-bottom:16px;
}
details.block:first-of-type{padding-top:0}
details.block summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-family:'Roboto Condensed',sans-serif;
  color:var(--azul-oscuro);
  font-weight:700;
  font-size:19px;
  line-height:1.3;
  padding:14px 0;
  -webkit-tap-highlight-color:transparent;
}
details.block summary::-webkit-details-marker{display:none}
details.block summary::after{
  content:"+";
  flex-shrink:0;
  width:22px;
  text-align:center;
  font-family:Arial,Helvetica,sans-serif;
  font-weight:400;
  font-size:22px;
  line-height:1;
  color:var(--azul);
}
details.block[open] summary::after{content:"\2212"}
details.block .details-body{padding-bottom:4px}
details.block .details-body p:last-child{margin-bottom:0}

.stats{display:flex;gap:28px;flex-wrap:wrap;margin:18px 0 6px}
.stat{background:var(--gris-fondo);border:1px solid var(--borde);border-radius:6px;padding:14px 20px;min-width:140px}
.stat .n{font-family:'Roboto Condensed',sans-serif;font-weight:700;font-size:26px;color:var(--azul)}
.stat .l{font-size:12.5px;color:var(--texto-suave)}

.people-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(160px,1fr));
  gap:28px 20px;
  margin-top:10px;
}
.person{text-align:center}
.person .avatar{
  width:120px;height:120px;margin:0 auto 14px;border-radius:50%;
  background:var(--azul);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:'Roboto Condensed',sans-serif;font-weight:700;font-size:32px;
  overflow:hidden;
}
.person .avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.person .nombre{font-weight:600;font-size:14.5px;color:var(--texto);line-height:1.3}
.person .institucion{font-size:12.5px;color:var(--texto-suave);margin-top:3px;line-height:1.3}

.event-item{border-left:3px solid var(--azul);padding:4px 0 4px 16px;margin-bottom:18px}
.event-item .fecha{color:var(--rojo-texto);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.02em}
.event-item h3{font-size:16.5px;margin:2px 0 4px}
.event-item p{margin:0;font-size:14.5px;color:var(--texto-suave)}

.seminar-card{background:var(--gris-fondo);border:1px solid var(--borde);border-left:4px solid var(--rojo);border-radius:6px;padding:20px 22px}
.seminar-card .fecha{color:var(--rojo-texto);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.02em;margin-bottom:6px}
.seminar-card h3{font-size:18px;margin:2px 0 6px}
.seminar-card .expositor{font-weight:600;color:var(--azul-oscuro);margin:0 0 10px;font-size:14.5px}
.seminar-card p{margin:0 0 12px;font-size:14.5px;color:var(--texto-suave)}
.seminar-card .lugar{margin:0;font-size:13.5px;color:var(--texto-suave)}

.note{background:var(--gris-fondo);border:1px solid var(--borde);border-radius:6px;padding:16px 18px;font-size:14px;color:var(--texto-suave)}

/* Archivo de charlas */
.archive-toolbar{margin:0 0 26px}
.archive-toolbar input[type="search"]{
  width:100%;
  font-family:'Roboto',Arial,Helvetica,sans-serif;
  font-size:15.5px;
  color:var(--texto);
  background:#fff;
  border:1.5px solid var(--borde);
  border-radius:6px;
  padding:12px 16px;
}
.archive-toolbar input[type="search"]:focus{outline:none;border-color:var(--azul)}
.archive-toolbar input[type="search"]::placeholder{color:var(--texto-suave)}
.archive-count{margin:10px 2px 0;font-size:13px;color:var(--texto-suave)}
.year-count{font-family:'Roboto',Arial,Helvetica,sans-serif;font-weight:400;font-size:14px;color:var(--texto-suave)}
.archive-year .event-item{margin-bottom:16px}
.archive-year .event-item:last-child{margin-bottom:0}
.archive-empty{display:none;color:var(--texto-suave);font-size:14.5px;padding:8px 0}
.resumen-toggle{
  display:inline-block;
  margin-top:4px;
  background:none;
  border:none;
  padding:0;
  font-family:'Roboto',Arial,Helvetica,sans-serif;
  font-size:13px;
  font-weight:600;
  color:var(--azul);
  cursor:pointer;
  -webkit-tap-highlight-color:transparent;
}
.resumen-toggle:hover{color:var(--rojo-texto)}
.archive-resumen{
  display:none;
  margin:8px 0 0;
  font-size:14px;
  color:var(--texto-suave);
  border-left:2px solid var(--borde);
  padding-left:12px;
}
.badge-tag{
  display:inline-block;
  margin-left:8px;
  padding:2px 9px;
  border-radius:999px;
  background:var(--azul);
  color:#fff;
  font-family:'Roboto Condensed',sans-serif;
  font-size:11px;
  font-weight:700;
  letter-spacing:.02em;
  text-transform:uppercase;
  vertical-align:middle;
}

.contact-box{background:var(--gris-fondo);border:1px solid var(--borde);border-radius:8px;padding:28px;text-align:center;margin-top:10px}
.contact-box .email{font-family:'Roboto Condensed',sans-serif;font-size:22px;color:var(--azul);font-weight:700}

/* Footer */
footer.site{border-top:1px solid var(--borde);background:var(--gris-fondo)}
footer.site .wrap{padding:26px 20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
footer.site .logos{display:flex;align-items:center;gap:16px}
footer.site .logos img{height:46px;width:auto}
footer.site p{margin:0;font-size:12.5px;color:var(--texto-suave)}

/* Portada */
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.section-head h2{margin:0;font-size:24px}
.section-head a{font-size:14.5px;font-weight:500;text-decoration:none}
.section-head a:hover{text-decoration:underline}
.talk-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.talk-grid .seminar-card h3{font-size:17px}
.talk-grid .seminar-card .expositor{margin-bottom:8px}
.home-section{margin-bottom:44px}
.home-section .event-item:last-child{margin-bottom:0}

/* Menú móvil */
.nav-toggle{display:none}

@media (max-width:640px){
  header.site .wrap{flex-direction:row;align-items:center;flex-wrap:wrap}
  .brandblock{flex:1 1 0;min-width:0;gap:12px}
  .brandblock .inst-name{font-size:11.5px}
  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;padding:0 11px;flex-shrink:0;
    background:#fff;border:1.5px solid var(--borde);border-radius:8px;cursor:pointer;
  }
  .nav-toggle span{display:block;height:2px;background:var(--azul-oscuro);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
  header.site.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  header.site.nav-open .nav-toggle span:nth-child(2){opacity:0}
  header.site.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .navblock{display:none;width:100%;flex-direction:column;align-items:flex-start;gap:14px;padding-top:6px}
  header.site.nav-open .navblock{display:flex}
  nav.site{flex-direction:column;gap:2px;width:100%}
  nav.site a{padding:10px 2px;border-bottom:1px solid var(--borde);font-size:16px}
  nav.site a.active{border-bottom-color:var(--rojo)}
  .hero .wrap{padding:36px 20px 32px}
  .hero .btn{margin-bottom:8px}
  .brandblock img{height:48px}
  .hero h1{font-size:27px}
  .stats{gap:14px}
}

@media (max-width:360px){
  .brandblock .inst-name{display:none}
  .brandblock img{height:42px}
}

/* Selector de idioma visible en móvil, junto al botón de menú */
.lang-toggle.lang-mobile{display:none}
@media (max-width:640px){
  .lang-toggle.lang-mobile{display:inline-flex}
  .navblock .lang-toggle{display:none}
}

/* Fotos de expositores (seminario) */
.expositor-foto{display:flex;align-items:center;gap:16px;margin:2px 0 4px}
.foto-expositor{width:88px;height:88px;border-radius:50%;object-fit:cover;flex:none;border:1px solid var(--borde)}
.seminar-card .expositor-foto{margin:0 0 10px}
.seminar-card .expositor-foto .expositor{margin:0}